[Bug] 复制单个空格子(源数据值为空)的时候，粘贴无效(没有触发粘贴事件）

[manupman]

Version

v0.24.0

Link to Minimal Reproduction

https://visactor.io/vtable/demo/interaction/copy-paste-cell-value

Steps to Reproduce

1. 通过官网demo 2. 置空一列数据进行复制粘贴
   let tableInstance; fetch('https://lf9-dp-fe-cms-tos.byteorg.com/obj/bit-cloud/VTable/North_American_Superstore_data.json') .then(res => res.json()) .then(data => { const columns = [ { field: 'Order ID', title: 'Order ID', width: 'auto' }, { field: 'Customer ID', title: 'Customer ID', width: 'auto' }, { field: 'Product Name', title: 'Product Name', width: 'auto' }, { field: 'Category', title: 'Category', width: 'auto' }, { field: 'Sub-Category', title: 'Sub-Category', width: 'auto' }, { field: 'Region123', title: 'Region', width: 'auto' }, { field: 'City', title: 'City', width: 'auto' }, { field: 'Order Date', title: 'Order Date', width: 'auto' }, { field: 'Quantity', title: 'Quantity', width: 'auto' }, { field: 'Sales', title: 'Sales', width: 'auto' }, { field: 'Profit', title: 'Profit', width: 'auto' } ]; const option = { records: data, columns, widthMode: 'standard', frozenColCount: 1, overscrollBehavior: 'none', keyboardOptions: { moveEditCellOnArrowKeys: true, copySelected: true, pasteValueToCell: true }, editor: '' // 配置一个空的编辑器，以遍能粘贴到单元格中 }; tableInstance = new VTable.ListTable(document.getElementById(CONTAINER_ID), option); window['tableInstance'] = tableInstance; });

Current Behavior

[Bug] 复制单个空格子(源数据值为空)的时候，粘贴无效(没有触发粘贴事件）

Expected Behavior

[Bug] 复制单个空格子(源数据值为空)的时候，可以进行粘贴并且能够触发change_cell_value进行监听

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

麻烦帮忙看看这个bug